diff --git a/deletegame.py b/deletegame.py
index 9e6b509..c991e51 100644
--- a/deletegame.py
+++ b/deletegame.py
@@ -1,11 +1,5 @@
 import psql,login
 
-def delete_game(gamename,username):
-	"""
-	get name of game and name of user.
-	remove game from game slot of user.
-	"""
-
 def get_game_slot_of_game(player, gamename):
 	"""
 	gets playername and game name,
@@ -20,7 +14,7 @@ def get_game_slot_of_game(player, gamename):
 	
 def main(req,form):
 	"""
-	get the name of a game,request,util.FieldStorage.
+	get request,util.FieldStorage.
 	manage the removal of game from game slots of players and 
 	delete game from database.
 	"""
diff --git a/login.py b/login.py
index 8c1482b..01df1a9 100755
--- a/login.py
+++ b/login.py
@@ -101,27 +101,39 @@ def login_form():
 	data += helper.footer()
 	return data
 
-def navigation_bar(username,sessionid):
+def navigation_bar(req,form):
 	"""
-	gets username and sessionid
+	gets request object and util.FieldStorage form.
 	writes the following to req:
 	- a button to return to the game overview
 	- a logout button
 	returns string
 	"""
+	username = form["username"]
+	sessionid = form["sessionid"]
+	game = form["game"]
 	#TODO: buttons
 	data="""
 	<form method="post">
 	<input type="hidden" name="username" value="%s">
 	<input type="hidden" name="sessionid" value="%s">
+	<input type="hidden" name="game" value="%s">
 	<input type="submit" id="submit" name="logout" value="logout">
 	<input type="submit" id="submit" name="game overview" value="game overview">
+	<input type="submit" id="submit" name="refresh" value="refresh">	
 	</form>
-	""" % (username,sessionid)
+	""" % (username,sessionid,game)
 	return(data)
 	
 
-
+def logout(req,form):
+	"""
+	gets request object and util.FieldStorage form.
+	reads username from form and clears timeout and sessionid from users table.
+	"""
+	username = form["username"]
+	psql.set_user_sessionid(username,"")
+	psql.set_user_timeout(username,"")
 
 
 def main(req,form):
@@ -130,9 +142,10 @@ def main(req,form):
 	#req.write(helper.footer())
 	if "sessionid" not in form.keys():
 		req.write(login_form())
-	elif ("create" in form.keys()) and ("username" in form.keys()):
-		pass
 	elif ("game overview" in form.keys()) and ("username" in form.keys()) and ("sessionid" in form.keys()):
 		game_overview_form(req,form)
+	elif ("logout" in form.keys()) and ("username" in form.keys()):
+		logout(req,form)
+		process_form(req,form)
 	else:
 		process_form(req,form)
diff --git a/main.py b/main.py
index 5bbf8ec..8dd071e 100755
--- a/main.py
+++ b/main.py
@@ -35,7 +35,7 @@ def handler(req):
 			elif "delete" in form.keys():
 				deletegame = apache.import_module("deletegame")
 				deletegame.main(req,form)
-			elif ("play" in form.keys()):
+			elif ("play" in form.keys()) or ("refresh" in form.keys()):
 				playgame = apache.import_module("playgame")
 				playgame.main(req,form)
 			else:
diff --git a/playgame.py b/playgame.py
index 081257c..7655ea1 100644
--- a/playgame.py
+++ b/playgame.py
@@ -41,7 +41,7 @@ def main(req,form):
 	"""
 	display selected goban and manage user input.
 	"""
-	req.write(str(form.keys())+"<hr>")
+	helper.debug(req,form,str(form.keys())+"<hr>")
 	
 	try:
 		gamename = form["game"]
@@ -61,8 +61,6 @@ def main(req,form):
 		if foundx:
 			if is_my_turn(req,form,gobandict):
 				(gobandict,retstring) = goban.process_form(req,form,gobandict)
-			else:
-				pass
 						
 		#do stuff
 		data = 	helper.header()
@@ -81,7 +79,7 @@ def main(req,form):
 	
 		#print goban
 		data += goban.display_goban(gobandict,req,form)
-		data += login.navigation_bar(form["username"],form["sessionid"])
+		data += login.navigation_bar(req,form)
 		data += helper.footer()
 		req.write(data)
 	
diff --git a/psql.py b/psql.py
index 894106f..33664e9 100755
--- a/psql.py
+++ b/psql.py
@@ -182,7 +182,10 @@ def update_database_field(table,column,new_value,uniqname,uniqvalue):
 			name of unique identifier and
 			value of unique identifier for field (e.g. 'username' and 'testuser')
 	"""
-	executestring ="UPDATE %s SET %s = '%s' WHERE %s = '%s'" % (table,column,new_value,uniqname,uniqvalue)
+	if new_value == "":
+		executestring ="UPDATE %s SET %s = DEFAULT WHERE %s = '%s'" % (table,column,uniqname,uniqvalue)
+	else:
+		executestring ="UPDATE %s SET %s = '%s' WHERE %s = '%s'" % (table,column,new_value,uniqname,uniqvalue)
 	sql_one_liner(executestring)
 
 ################# access of users table #####################################################################
@@ -233,12 +236,13 @@ def set_user_sessionid(username,sessionid):
 	"""
 	update_users_table_field(username,"sessionid",sessionid)
 
-def set_user_timeout(username):
+def set_user_timeout(username,timeout=None):
 	"""
 	gets username, sets timeout to time.time + 30min
 	"""
 	import time
-	timeout = int(time.time()) + 900 #current time in seconds + seconds for session
+	if timeout == None:
+		timeout = int(time.time()) + 900 #current time in seconds + seconds for session
 	update_users_table_field(username,"timeout",timeout)
 
 def update_users_table_field(username,column,new_value):